444221042555 has 4 divisors (see below), whose sum is σ = 533065251072. Its totient is φ = 355376834040.

The previous prime is 444221042501. The next prime is 444221042563. The reversal of 444221042555 is 555240122444.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 444221042555 - 2²⁰ = 444219993979 is a prime.

It is a super-2 number, since 2×444221042555² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44422104251 + ... + 44422104260.

It is an arithmetic number, because the mean of its divisors is an integer number (133266312768).

Almost surely, 2^444221042555 is an apocalyptic number.

444221042555 is a deficient number, since it is larger than the sum of its proper divisors (88844208517).

444221042555 is an equidigital number, since it uses as much as digits as its factorization.

444221042555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88844208516.

The product of its (nonzero) digits is 256000, while the sum is 38.

Adding to 444221042555 its reverse (555240122444), we get a palindrome (999461164999).

The spelling of 444221042555 in words is "four hundred forty-four billion, two hundred twenty-one million, forty-two thousand, five hundred fifty-five".